It should also be appreciated that mathematics is a concise, precise, and very unforgiving language. That said, we need to be patient in that we must build our skill set one step at a time. The skill set is built upon prior knowledge. Therefore, make sure you feel competent and proficient in your current step before you tackle the next step.
I was not good in mathematics in middle school. Well, it was over half a century ago. What I did was to complete all, I really mean ALL, the problems in my geometry, algebra, and trigonometry textbooks. I spent one to two summers to write up detailed solutions to these exercises. That was quite a hill to climb, but I felt much more at ease with mathematics afterward. Well, I still had to struggle with mathematics in my undergraduate years, but it was manageable.
If you can't figure out where to start, see if one of your friends in the class, the teacher, or other resources at your school have time to sit with you and point out a good path.
Don't get too frustrated. I am sure you can do it!
Math hasn't always been my strongest subject in school. One thing that I've learned that works for me is to set dedicated time where I wasn't distracted, ensure I had some sort of visuals (You Tube) or live tutoring online is a great start . I would follow the equations by writing them out, pause and read on the principles of the equation (This Help) repeat the process two times or until you become familiar. I follow that same process to this day and it's worked for me. Be encouraged! You can do this!